package com.kin207.netty.util;

import java.text.DateFormat;
import java.text.ParseException;
import java.text.SimpleDateFormat;
import java.time.LocalDateTime;
import java.time.ZoneId;
import java.time.temporal.ChronoUnit;
import java.util.Calendar;
import java.util.Date;
import java.util.TimeZone;

/**
 * 说明：日期处理 创建人：kinfeng 修改时间：2015年11月24日
 * 
 * @version
 */
public class DateUtil {

	private final static SimpleDateFormat sdfYear = new SimpleDateFormat("yyyy");
	private final static SimpleDateFormat sdfDay = new SimpleDateFormat("yyyy-MM-dd");
	private final static SimpleDateFormat sdfDays = new SimpleDateFormat("yyyyMMdd");
	private final static SimpleDateFormat sdfTime = new SimpleDateFormat("yyyy-MM-dd HH:mm:ss");
	private final static SimpleDateFormat sdfTimes = new SimpleDateFormat("yyyyMMddHHmmss");
	private final static SimpleDateFormat strTimes = new SimpleDateFormat("yyMMddHHmm");

	/**
	 * 获取YYYY格式
	 * 
	 * @return
	 */
	public static String getSdfTimes() {
		return sdfTimes.format(new Date());
	}

	/**
	 * 获取YY格式
	 * 
	 * @return
	 */
	public static String getStringTimes() {
		return strTimes.format(new Date());
	}

	/**
	 * 获取YYYY格式
	 * 
	 * @return
	 */
	public static String getYear() {
		return sdfYear.format(new Date());
	}

	/**
	 * 获取YYYY-MM-DD格式
	 * 
	 * @return
	 */
	public static String getDay() {
		return sdfDay.format(new Date());
	}

	/**
	 * 获取YYYYMMDD格式
	 * 
	 * @return
	 */
	public static String getDays() {
		return sdfDays.format(new Date());
	}

	/**
	 * 获取YYYY-MM-DD HH:mm:ss格式
	 * 
	 * @return
	 */
	public static String getTime() {
		return sdfTime.format(new Date());
	}

	/**
	 * @Title: compareDate
	 * @Description: TODO(日期比较，如果s>=e 返回true 否则返回false)
	 * @param s
	 * @param e
	 * @return boolean
	 * @throws @author KinFeng
	 */
	public static boolean compareDate(String s, String e) {
		if (fomatDate(s) == null || fomatDate(e) == null) {
			return false;
		}
		return fomatDate(s).getTime() >= fomatDate(e).getTime();
	}

	/**
	 * 格式化日期
	 * 
	 * @return
	 */
	public static Date fomatDate(String date) {
		DateFormat fmt = new SimpleDateFormat("yyyy-MM-dd");
		try {
			return fmt.parse(date);
		} catch (ParseException e) {
			e.printStackTrace();
			return null;
		}
	}

	/**
	 * 校验日期是否合法
	 * 
	 * @return
	 */
	public static boolean isValidDate(String s) {
		DateFormat fmt = new SimpleDateFormat("yyyy-MM-dd");
		try {
			fmt.parse(s);
			return true;
		} catch (Exception e) {
			// 如果throw java.text.ParseException或者NullPointerException，就说明格式不对
			return false;
		}
	}

	/**
	 * @param startTime
	 * @param endTime
	 * @return
	 */
	public static int getDiffYear(String startTime, String endTime) {
		DateFormat fmt = new SimpleDateFormat("yyyy-MM-dd");
		try {
			// long aa=0;
			int years = (int) (((fmt.parse(endTime).getTime() - fmt.parse(startTime).getTime()) / (1000 * 60 * 60 * 24))
					/ 365);
			return years;
		} catch (Exception e) {
			// 如果throw java.text.ParseException或者NullPointerException，就说明格式不对
			return 0;
		}
	}

	/**
	 * <li>功能描述：时间相减得到天数
	 * 
	 * @param beginDateStr
	 * @param endDateStr
	 * @return long
	 * @author Administrator
	 */
	public static long getDaySub(String beginDateStr, String endDateStr) {
		long day = 0;
		java.text.SimpleDateFormat format = new java.text.SimpleDateFormat("yyyy-MM-dd");
		java.util.Date beginDate = null;
		java.util.Date endDate = null;

		try {
			beginDate = format.parse(beginDateStr);
			endDate = format.parse(endDateStr);
		} catch (ParseException e) {
			e.printStackTrace();
		}
		day = (endDate.getTime() - beginDate.getTime()) / (24 * 60 * 60 * 1000);
		// System.out.println("相隔的天数="+day);

		return day;
	}

	/**
	 * 得到n天之后的日期
	 * 
	 * @param days
	 * @return
	 */
	public static String getAfterDayDate(String days) {
		int daysInt = Integer.parseInt(days);

		Calendar canlendar = Calendar.getInstance(); // java.util包
		canlendar.add(Calendar.DATE, daysInt); // 日期减 如果不够减会将月变动
		Date date = canlendar.getTime();

		SimpleDateFormat sdfd = new SimpleDateFormat("yyyy-MM-dd HH:mm:ss");
		String dateStr = sdfd.format(date);

		return dateStr;
	}

	public static String dateToString(Date day) {
		SimpleDateFormat sdfd = new SimpleDateFormat("yyyy-MM-dd HH:mm:ss");
		String dateStr = sdfd.format(day);
		return dateStr;
	}

	/**
	 * 得到n天之后是周几
	 * 
	 * @param days
	 * @return
	 */
	public static String getAfterDayWeek(String days) {
		int daysInt = Integer.parseInt(days);
		Calendar canlendar = Calendar.getInstance(); // java.util包
		canlendar.add(Calendar.DATE, daysInt); // 日期减 如果不够减会将月变动
		Date date = canlendar.getTime();
		SimpleDateFormat sdf = new SimpleDateFormat("E");
		String dateStr = sdf.format(date);
		return dateStr;
	}

	/**
	 * 推算以今天凌晨起多少个小时以后的时间
	 * 
	 * @param args
	 */
	public static String getTime10(int hour) {
		Calendar cal = Calendar.getInstance();
		cal.set(Calendar.HOUR_OF_DAY, hour);
		cal.set(Calendar.MINUTE, 0);
		cal.set(Calendar.SECOND, 0);
		String end = strTimes.format(cal.getTime());
		return end;
	}

	/**
	 * 推算以今天凌晨起多少个小时以后的时间
	 * 
	 * @param args
	 */
	public static String getTime14(int hour) {
		Calendar cal = Calendar.getInstance();
		cal.set(Calendar.HOUR_OF_DAY, hour);
		cal.set(Calendar.MINUTE, 0);
		cal.set(Calendar.SECOND, 0);
		String end = sdfTime.format(cal.getTime());
		return end;
	}

	/**
	 * 获取指定时间到格林威治时间的秒数
	 * UTC：格林威治时间1970年01月01日00时00分00秒（UTC+8北京时间1970年01月01日08时00分00秒）
	 * 
	 * @param time
	 * @return
	 */
	public static long diffSeconds() {
		Calendar calendar = Calendar.getInstance();
		calendar.clear();
		Date datetime = new Date();
		calendar.setTime(datetime);
		/*
		 * TimeZone timeZone = TimeZone.getTimeZone("GMT+08:00");
		 * calendar.setTimeZone(timeZone);
		 */
		return calendar.getTimeInMillis() / 1000;
	}

	/**
	 * date 转 calender
	 * 
	 * @param s
	 * @return
	 */
	public static long dateToStampS(String s) {
		String res;
		SimpleDateFormat simpleDateFormat = new SimpleDateFormat("yyyy-MM-dd HH:mm:ss");
		Date date = null;
		try {
			date = simpleDateFormat.parse(s);
		} catch (ParseException e) {
			e.printStackTrace();
		}
		long ts = date.getTime();
		return ts;
	}
	/**
	 * 获取离一天结束时间（秒）
	 * @return
	 */
    public static Long getRemainSecondsOneDay(Date currentDate) {
        LocalDateTime midnight = LocalDateTime.ofInstant(currentDate.toInstant(),
                ZoneId.systemDefault()).plusDays(1).withHour(0).withMinute(0)
                .withSecond(0).withNano(0);
        LocalDateTime currentDateTime = LocalDateTime.ofInstant(currentDate.toInstant(),
                ZoneId.systemDefault());
        long seconds = ChronoUnit.SECONDS.between(currentDateTime, midnight);
        return  seconds;
    }

	public static void main(String[] args) {
		Calendar cal = Calendar.getInstance();
		cal.set(Calendar.HOUR_OF_DAY, 38);
		cal.set(Calendar.MINUTE, 0);
		cal.set(Calendar.SECOND, 0);
		String end = strTimes.format(cal.getTime());
		System.out.println(end);
		System.out.println(diffSeconds());
		String startTime = DateUtil.dateToStampS("2020-03-20 10:58:19") / 1000 + 60 * 60 * 8 + "";
		String time = DateUtil.diffSeconds() + 60 * 60 * 8 + "";
		System.out.println(getRemainSecondsOneDay(new Date()));
	}
}
